CVE-2026-19970
Received Received - Intake

Heap-based Buffer Overflow in Open Asset Import Library Assimp

Publication date: 2026-08-17

Last updated on: 2026-08-17

Assigner: VulDB

Description
A vulnerability was detected in Open Asset Import Library Assimp 17c12da. This affects the function Assimp::MDLImporter::AddBonesToNodeGraph_3DGS_MDL7 of the file code/AssetLib/MDL/MDLLoader.cpp of the component Node Parser. The manipulation of the argument bones_num results in heap-based buffer overflow. The attack can be executed remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

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Meta Information

Published
2026-08-17
Last Modified
2026-08-17
Generated
2026-08-17
AI Q&A
2026-08-17
EPSS Evaluated
N/A
NVD
CVE-2026-19970
EUVD
EUVD-2026-60021

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
assimp open_asset_import_library *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Attack-Flow Graph

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Executive Summary

This is a heap-based buffer overflow vulnerability in the Open Asset Import Library (Assimp). It occurs in the MDLImporter::AddBonesToNodeGraph_3DGS_MDL7 function when processing malformed 3DGS MDL7 model files. The function uses an untrusted bone count value from the file to iterate over a fixed-size heap-allocated bone pointer array. This causes the pointer to step past the end of the buffer, leading to a heap buffer overflow read.

Detection Guidance

To detect this vulnerability, use AddressSanitizer (ASAN) during fuzz testing of Assimp with malformed 3DGS MDL7 model files. Monitor for heap-buffer-overflow errors in the MDLImporter::AddBonesToNodeGraph_3DGS_MDL7 function. Check for crashes or memory corruption when processing such files.

Impact Analysis

An attacker could exploit this vulnerability remotely by providing a specially crafted 3DGS MDL7 file. This could lead to memory corruption, crashes, or potentially allow arbitrary code execution on the system running the vulnerable Assimp library. Users processing untrusted 3D model files are at risk.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by enabling remote code execution or data exfiltration through heap-based buffer overflow. Exploitable flaws in file parsing libraries may lead to unauthorized access to sensitive data, violating confidentiality requirements under these regulations.

Mitigation Strategies

Immediately update Assimp to the latest patched version if available. Avoid processing untrusted 3DGS MDL7 model files until a fix is applied. Implement input validation to reject malformed files. Monitor for unusual memory access patterns or crashes in Assimp processes.

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